SERIES

Planet Earth: Blue Planet II A new episode of the nature documentary series explores coral reefs, home to roughly a quarter of marine species, who thrive in these underwater "mega-cities." Locations include Egypt, Borneo, French Polynesia and the Great Barrier Reef of Australia. 9 p.m. BBC America

SPECIALS

NFL Honors A new edition of the annual ceremony salutes pro football's best players and plays from the 2017 season. 9 p.m. NBC

MOVIES

Gifted A 7-year-old girl (McKenna Grace) who shows signs of being a math prodigy is offered a scholarship to an elite private school, but her uncle and guardian (Chris Evans) turns it down, fearing that it would keep her from enjoying a normal childhood, in director Marc Webb's 2017 dramedy. Jenny Slate, Lindsay Duncan and Octavia Spencer also star. 8 p.m. HBO

The Simone Biles Story: Courage to Soar Based on a book co-written by Biles, this new TV movie chronicles the years of grueling work and painful sacrifices the young gymnast (Jeanté Godlock) endured on a path to winning 19 Olympic and World Championship medals, cementing her position as one of the greatest gymnasts of all time. Julius Tennon and Tisha Campbell-Martin are cast as Simone's parents, and Kathleen Rose Perkins plays head coach Aimee Boorman. 8 p.m. and 11 p.m. Lifetime

My Secret Valentine In this new 2018 romance, Hallmark regular Lacey Chabert stars as the manager of a busy Portland bistro who takes a break to visit her family's winery, where she learns that her dad (Peter MacNeill) is getting ready to retire and is considering selling it to a large New York beverage company. Andrew W. Walker also stars. 9 p.m. Hallmark Channel